Developer
<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2023 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\CodeCleaner;
use PhpParser\Node;
use PhpParser\Node\Name;
use PhpParser\Node\Stmt\Namespace_;
use Psy\CodeCleaner;
/**
* Provide implicit namespaces for subsequent execution.
*
* The namespace pass remembers the last standalone namespace line encountered:
*
* namespace Foo\Bar;
*
* ... which it then applies implicitly to all future evaluated code, until the
* namespace is replaced by another namespace. To reset to the top level
* namespace, enter `namespace {}`. This is a bit ugly, but it does the trick :)
*/
class NamespacePass extends CodeCleanerPass
{
private $namespace = null;
private $cleaner;
/**
* @param CodeCleaner $cleaner
*/
public function __construct(CodeCleaner $cleaner)
{
$this->cleaner = $cleaner;
}
/**
* If this is a standalone namespace line, remember it for later.
*
* Otherwise, apply remembered namespaces to the code until a new namespace
* is encountered.
*
* @param array $nodes
*
* @return Node[]|null Array of nodes
*/
public function beforeTraverse(array $nodes)
{
if (empty($nodes)) {
return $nodes;
}
$last = \end($nodes);
if ($last instanceof Namespace_) {
$kind = $last->getAttribute('kind');
// Treat all namespace statements pre-PHP-Parser v3.1.2 as "open",
// even though we really have no way of knowing.
if ($kind === null || $kind === Namespace_::KIND_SEMICOLON) {
// Save the current namespace for open namespaces
$this->setNamespace($last->name);
} else {
// Clear the current namespace after a braced namespace
$this->setNamespace(null);
}
return $nodes;
}
return $this->namespace ? [new Namespace_($this->namespace, $nodes)] : $nodes;
}
/**
* Remember the namespace and (re)set the namespace on the CodeCleaner as
* well.
*
* @param Name|null $namespace
*/
private function setNamespace($namespace)
{
$this->namespace = $namespace;
$this->cleaner->setNamespace($namespace === null ? null : $this->getParts($namespace));
}
/**
* Backwards compatibility shim for PHP-Parser 4.x.
*
* At some point we might want to make the namespace a plain string, to match how Name works?
*/
protected function getParts(Name $name): array
{
return \method_exists($name, 'getParts') ? $name->getParts() : $name->parts;
}
}
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